CHRISTIAN SOCIAL SERVICES COMMISSION- (CSSC)

WESTERN ZONE

FORM TWO JOINT EXAMINATION

CODE: 011  PHYSICS

TIME: 2:30 HRS   Date: 28^th August, 2023

INSTRUCTIONS

1. This paper consists of sections A, B, and C with a total of ten (10) questions
2. Answer all questions in section A and B and two questions from section C
3. Section A and C carries fifteen (15) marks, section B carries seventy (70) marks
4. All answers must be written in blue or black ink
5. All answers must be written in the space provided
6. Where necessary the following constants may be used

i. Acceleration due to gravity g=10^m/s²

ii. Density of water = 1.0g/cm³ or 100kg/m³

iii. Pie,

7. Cellular and any other authorized material are not allowed in the examination room.

8. Write your Assessment Number at the top right corner of every page

SECTION A: (15 MARKS)

Answer all questions in this section

1. For each of the items i-x, choose the correct answer from the given alternatives and write its letter in the box provided.

i. Which one of the following explanations does not describe the importance of studying physics?

A. It enables us to answer many questions concerned with physical properties of matter

B. It enables different people to acquire skills that require in different professions

C. It enables us to design and manufacture different items

D. It develops awareness of conserving environment

ii. The same body is immersed in liquid A and then in liquid B the extent to which the body sinks in liquid B is less than in liquid A. what conclusion can be derived from such observation?

A. The density of liquid A is more than the density of liquid B

B. The density of liquid B is more than that of liquid A

C. The density of solid body is less than that of the liquid

D. The density of liquid A is the same as that of liquid B

iii. Which of the following equilibrium condition apply to walking?

A. Un stable equilibrium

B. Stable equilibrium

C. Neutral equilibrium

D. Both stable and unstable equilibrium

iv. A student gets an electric shock and falls down unconscious in a physics laboratory. Which of the following would you do first to help the victim?

A. Administers breathing exercise

B. call the physics teacher

C. call other students

D. call a medical doctor

v. The P.d of 1.5v is read on a voltmeter when a current of 0.5a is on the alumeter. what is the resistance of the conductor

A. 1.5 Ω

B. 0.5 Ω

C. 3 Ω

D. 0.3 Ω

vi. In a loading a lorry, a man lifts boxes each of weight 100N through a height of 1.5m. If he lifts 4 boxes per minute, the average power the man is working is ;

A.  100 watt 

B.   10 watt

C.   600 watt

D.  37.5 watt

vii. An object weights 12N in air and 9N when totally immersed in water. the relative density is___________

A.

B.

C. 3

D. 4

viii. In an electrical cell while in use, the change in energy is from:

A. Electrical to mechanical

B. Chemical to mechanical

C. Electrical to chemical

D. Chemical to electrical

ix. A person dealing with the branch of science that deals with the study of matter, energy and mutual interactions between them is called_______

A. Chemist

B. Pilot

C. Physicit

D. Physics

x. A cooking oil was mixed with water and poured into a measuring cylinder and allowed to settle for three minutes, which phenomenon will be observed?

A. Cooking oil floats over water

B. Water floats over the oil

C. Water and oil completely mixed up

D. Cooking oil is solute in water

2. Match the items of list A with the most correct responses from list B to make the correct statement.

SECTION B: (70 marks)

Answer all questions in this question)

3. (a) One among of the potential project in Tanzania is the construction of

Mwalimu Nyerere Hydro-electric power. In order to produce more electricity. Briefly describe any four (4) applications of energy generated from this project

(b) What are sustainable energy sources?

4. The rocket moves the earth to other planet called mars. If it weights 980N on the earth and on the Mars weights 588N. State two reasons why the weight of the rocket on the surface of the earth to the planet Mars decreased?

(b) A ship sails from Lake Tanganyika to Lake Victoria. Where does it float higher? explain

5. (a) The school administration has hired two cranes A and B to be used in the project of constructing four classrooms. Each crane lifts objects having masses of 200 kg to a height of 12m.Crane A lifts its objects in 10 seconds while crane B requires 15 seconds to lift its object. The two cranes lift the objects at a constant speed.

(b) With reasons, state and show which crane is more powerful?

6. Aman’s home is 1.5km due west of his school in the morning he walks along the straight path to school. In the evening he decided to take same path to go back home.

i. What is the total distance covered by Aman in his journey?

ii. What is the total displacement covered by Aman for his journey?

(b) (i) State two similarities between distance and displacement

(ii) State two differences between distance and displacement

7. (a) State two advantages of wind energy over the oil energy.

(b) The figure below shows a pulley in which an effort of 30N is used to lift load of 90N. Determine:

i. Mechanical advantages

ii. Velocity ratio of the pulley

8. (a) A uniform half meter rule is pivoted at the 20cm mark and balances horizontally when a body of mass 30g is hung at the 5cm mark from one end.

Calculate the mass of the rule

(b) Draw the diagram of the arrangement in (a) above

(c) Calculate the pressure due to column of mercury 750 mmHg High. Given the density of mercury equals 13600 kg/m³

9. Explain briefly why the efficiency of a machine is always less than 100%

(b) A load wheel barrow weighing 800N is pushed up an incline plane by a force of 150N parallel to the plane. If the plane rises 50cm for every 400 cm length of the plane. Find:

i. The velocity ratio

ii. The mechanical advantage

iii. The efficiency of the machine

SECTION C: (15 marks)

10. (a) Suppose you are asked by the physics teacher to prepare electrical components and instruments for an experiment to verify ohm’s law i. Give five (5) components that can be used in the experiment ii. Draw a clear simple circuit which will be suitable for the experiment by using components and instruments you mentioned in 10(a) (i) above

(b) Study the circuit diagram in the figure below then answer the questions that follow:

i. If the current flowing in 5Ω resistor is 2A calculate then current flowing in 10Ω

ii. Potential different across 20Ω

THE UNITED REPUBLIC OF TANZANIA PRESIDENT'S OFFICE REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

MOROGORO FORM TWO REGIONAL ASSESSMENT PHYSICS

CODE: 031

TIME: 2:30 HOURS YEAR: 2023

INSTRUCTIONS

1. This paper consists of section A, B and C with a total of ten (10) questions. Answer all questions.
2. All writing must be in blue or black ink except drawings which must be in pencil.
3. Where necessary use the following constants:

i) Acceleration due to gravity, g= 10m/s² or ION/kg ii) Density of water =1000kg/m ³

SECTION A (15 Marks)

1. For each of the items (i) - (x), choose the correct answer from the alternatives and write its letter in the box provided.

i) Why Physics, Chemistry and Biology are natural science subjects?

A. They need practical work only

B. They need only theory for learning

C. They need only observation

D. They need practical and theory work for learning

ii) A Doctor buys petrol from a petrol filling station. What does he/she pay for?

A. Mass C. Density

B. Volume D. Pressure

iii) The standard units of the basic quantities in measurements are as follows;

A. Kilogram, cubic metre and minutes

B. Metre, cubic centimeter and hours

C. Kilogram, metre and second

D. Centimeter, hours and cubic millimeter

iv). On the moon, as astronaut cannot drink lemonade with the help of a straw because; -

A. Acceleration due to gravity on the moon is less.

B. Lemonade evaporate quickly on the moon.

C. Increases due to area.

D. There is no atmosphere on the moon.

v) Relative density of a substance is 2.5. What is its density?

A. Equal to the density of water

B. Greater than density of water

C. Equal to the volume of water displaced

D. Less than density of water

vi). Which of the following forces can cause the mosquito larvae to float on water?

A. Surface tension C. Friction force

B. Adhesive force D. Cohesive force

vii) If the angle between two plane mirrors is 60 ⁰ what will be the number of images?

1. 2
2. 3
3. 4
4. 5

viii) What name is given to the process in which a parallel beam of incident light is reflected as a not parallel beam of light?

A. Diffuse reflection

B. Internal reflection

C. Regular reflection

D. Angular reflection

ix) Which of the machines below is a first-class lever?

A. Scissor C. Shovel

B. Wheelbarrow D. Tweezer

x) A current of I.OA passes in the circuit as shown in the figure below. What is the numerical value of resistance Q?

A. 1.5

B. 3.5

C. 4.5

D. 2.5

2. Match each of the following devices from LIST A with the corresponding useful form of energy the devices are designed to produce from LIST B by writing a letter of the correct response below the item in the table provided.

SECTION B (70 Marks)

Answer all questions

3. a) Identify three equations of motion in the straight line.(3 marks)

b) i) Briefly explain the motion of an object under gravity by taking an example of a stone thrown straight up into the air.

ii) A car moving with a velocity of 60km/h is uniformly retarded and brought to rest after 10 seconds. Calculate its acceleration. (4 marks)

4. a) Use the concept of pressure to explain why during construction of a railway, wide wooden or concrete sleepers are placed below the railway tracks? (3 marks)

b) i) What are the three factors does pressure in liquid depend on? (3marks)

ii) Calculate the pressure exerted on a diver at a depth of 20m below the surface of water in the sea. (4 marks)

5. a) i) The passengers sitting in a moving bus tend to fall forward when the bus suddenly stops. Explain why? (3marks)

ii) State the law governing the phenomenon happened in 5(a)(i) above. (3 marks)

b) Differentiate elastic collision from inelastic collision by considering the way billiard balls collide on the pool table game. (4 marks)

6. a) The figure 1 below shows the magnetic field between the poles of two bar magnets.

Figure 1

i) Explain what is meant by the term represented by letter X? (4 marks)

ii) Indicate the polarity of A, B, C and D. (4marks)

b) A student wants to store his two bar magnets for future use. Advise him two methods that he can use to store the magnets for effective and durable use of their magnetism. (2 marks)

7. a) What are the conditions for the body to be in equilibrium?

b) i) Why mechanics prefer to use a spanner of longer stem than spanner of shorter stem to tighten or loosen a nut on a bolt? (3 marks)

ii) The moment of a force about a point is 12000Nm. If the magnitude of force is 6000N, find the perpendicular distance between the point and the line of action of force. (3 marks)

8. a) (i) A pulley is a simple machine that is made up of a wheel and a rope, chord or chain. Identify three types of pulley.

(ii) Draw a diagram of combination pulley system which gives velocity system of 4.0.

b) The hydraulic press multiplies an applied effort using the pressure of a liquid or gas. List three applications of the hydraulic press in our daily life. (3 marks)

9. Two girls Vick and Vero were discussing on the properties of light energy. Assist them four properties of light energy. (4 marks)

b) With the aid of a well labelled diagram, state the laws of reflection. (6 marks)

SECTION C (15 Marks) 

Answer all questions

10. Form two students were given the following electrical components by their Physics Teacher so that to construct a simple electric circuit: Two cells, a switch, an electric lamp, an ammeter, a voltmeter and pieces of connecting wires.

a) Draw a suitable electric circuit by using all the components given.(5 marks)

b) Explain an application of each component used in the circuit drawn in 10 (a) above. (6 marks)

c) Suppose the students wanted to construct the circuit of lower resistance, advise them which factors they should consider during constructing the circuit. (4 marks)

PRESIDENT’S OFFICE REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT  MVOMERO DISTRICT COUNCIL FORM TWO MOCK EXAMINATION

CODE: 031 PHYSICS

TIME: 2:30 Hours MAY-2023

Instruction

1. This paper consists of section A, B and C with a total of ten (10) questions.
2. Answer all questions in the space provided
3. Section A and C carries fifteen (15) marks each while section B carries seventy (70) marks.
4. All writing must be in blue or black ink except drawings which must be in pencil.
5. All communication devices, calculators and any unauthorized materials are not allowed in the assessment room.
6. Write your Assessment Number at the top right corner of every page.
7. Where necessary the following constants may be used.

1. Acceleration due to gravity, g = 10m/s²
2. Density of water = 1000Kg/m³
3. Density of lead=11.3g/cm³
4. Pie, π=3.14

SECTION A (15 MARKS)

Answer all questions in this section

1. For each of the items (i)-(x), choose the correct answer from the given alternatives and write its letter in the box provided

(i). A needle may float on a clean water but sinks when some detergent is added to water because the detergent.

1. educes the density of water
2. Increase adhesive force between the needle and water molecules.
3. Lowers the surface tension of water.
4. Makes water surface slippery.

(ii) A racing car turnaround corner safely than a tall bus can do because

1. The bus has wider wheel base
2. The bus is heavier compared to a racing car
3. The racing car has lower centre of gravity
4. The racing car has higher centre of gravity.

(iii) Which of the following materials can magnetically made strong?

1. Nickel and Copper
2. Steel and Brass.
3. cobalt and Iron
4. Cobalt and Copper

(iv)A house building contractor fitted window glass panes which someone cannot see through but the room are full illuminated with light. These types of glass pane materials are said to be

1. Dim
2. Opaque 
3. Transparent
4. Translucent

(v) Why the mechanical advantage is less than three in a single rope three pulleys system?

1. Because the effort may vary
2. Due to load rose
3. Because the upper pulley does not move
4. Due to friction on pulleys

(vi) If you are caught outside during a severe thunderstorm, you should

1. Take shelter under the nearest tree
2. Stand under power lines
3. Move to higher ground
4. Hide in a ditch

(vii) A mass of 0.2kg produces an extension of 8cm in a spring. The force required to produce an extension of 6 cm is

1. 0.75N. C. 2.70N
2. 1.50N. D. 24.00N

(viii) Form two students had a trip to Mikumi national park when they entered in a bus most of them fell backwards, when the bus moved forward, their geography teacher told them to be careful. This situation is explained by

1. The unstable equilibrium of the bus
2. The newton’s third law of Motion
3. The newton’s second law of motion
4. The newton’s first law of motion

(ix) Pressure in a liquid is independent of the

1. Density of the liquid.
2. Depth below the surface of the liquid.
3. Pressure exerted on the surface of the liquid above.
4. Cross sectional area and the shape of the vessel containing the liquid.

(x) A student measured the diameter of a wire Using a screw gauge and he repeated the experiment four times and listed the measurements. The correct measurement was

1. 5.3cm
2. 5.32 cm 
3. 5.32 cm
4. 5.3200 cm

2. Match the meaning of the terminologies used in structure and properties of matter in list A With their corresponding terms in list B by writing the letter of the correct answer in the Table provided.

 Answers

SECTION B (70 marks)

Answer all questions in this section

3. (a). State the Archimedes principle

__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

(b). List down three conditions necessary for a body to float

1. ________________________________________________________________________________________________________________________________________________
2. ________________________________________________________________________________________________________________________________________________
3. ________________________________________________________________________

(c). An object of weight  when immersed in the water it experiences an up thrust of . Calculate the following

1. Real weight

2. Relative density

3. Density of the object in

4. (a) State the principle of moments

__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

(b)(i) Distinguish between stable equilibrium and unstable equilibrium

____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

(ii)Mention two conditions necessary for an object to be in equilibrium under action of parallel Forces

________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

(c) A uniform half –metre rule is freely pivoted at 15cm mark and it balances horizontally when

a body of mass of 40g is hung from a 2cm mark

(i)Draw a clearly labelled diagram to illustrate the forces on a half metre rule.

(ii) Calculate the mass of the rule

5. (a) Give the meaning of the following terms

1. Velocity ratio ________________________________________________________________________________________________________________________________________

ii. Efficiency __________________________________________________________________________________________________________________________________________________________________________

(b).A perfect machine has efficiency of 100% but practically there is no perfect machine why?

__________________________________________________________________________________________________________________________________________

(c )The diagram below shows a box of weight 150N being pulled at a steady speed up by a force of 100N. If the height of the plane is 2m above the ground and the length of the plane is 4m.

Calculate

1. Mechanical advantage

2. Velocity ratio of the machine

6. (a) State Paschal principle as it applied in pressure

____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

(b) State any four application of atmospheric pressure

1. ___________________________________________________
2. ___________________________________________________
3. ___________________________________________________
4. ___________________________________________________

(c). Briefly explain why the woman wearing shoes with pointed heels is more likely to cause damage to the wooden floor than the elephant.

______________________________________________________________________________________________________________________________________________________

(d). What will be the pressure due to a column of water of height  if the density of water is .

7. (a) A form two students performed an experiment on determination of the acceleration due to gravity by using an iron metal ball. Briefly describe the energy changes when the bob of a Simple pendulum swings from one side to another.

2. A pump raises 100kg of water through a height of 30m in 10sec. What is the power developed by the pump.

8. (a) With aid of diagram, state the laws of reflection of light.

(b) List four properties of the image formed by a plane mirror.

(i)   

(ii) 

(iii) 

(iv) 

(c) Determine number of images that can be formed when two plane mirrors placed at

2. Parallel to each other

9. (a)Explain how the area of plates and distance between plates affect the capacitance of the

Capacitor

(b)A capacitor of capacitance 250is allowed to charge until the potential difference between its Plates is 10v. How much charge accumulated on the plates during the charging process?

(c). Draw the sketch of a large and well labeled gold – leaf electroscope.

SECTION C (15 MARKS)

Answer questions ten (10)

10.(a) State Ohm’s law

_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

(b)The circuit diagram below that shows the current through the 6 Ω resistor is 2.5 A.

(i) What is the magnitude of the voltage from the power supply?

3. Determine the current through the 8 Ω resistors.

(c).The form two students are given a set of materials in physics Laboratory as following Rheostat, voltmeter, ammeter, fixed resistor, switch and a cell to perform experiment aimed to verify ohm’s law. Draw a complete circuit diagram to show the arrangement such that the current can flow.

Candidate's Examination Number. . . . . . . . . . . . . 

PRESIDENT'S OFFICE REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT 
KILIMANJARO REGION MOCK FORM TWO EXAMINATION

CODE: 031 PHYSICS

TIME: 2:30 HRS MAY 2023 

INSTRUCTIONS

1. This paper consists of sections A,B and C with a total of ten (10)questions.
2. Answer all questions in all sections
3. Sections A and C carries fifteen (15) Marks each and section B carries seventy (70) Marks
4. Write your examination number at the top right corner of every page
5. All answer must be written in the space provided
6. All writing must be in blue or black ink EXCEPT drawing which must be in pencil
7. Cell phones and calculators are not allowed.
8. Where necessary the followings constants may be used:-

• Density of water=1g/cm³ or 1000kg/m³
• Density of mercury-13.6g/cm³ or 13600kg/m³
• Acceleration due to gravity=l0m/s²

SECTION A (15 Marks)

1. For each of the following items (i) to (x), choose the correct answer from the given alternatives and write its letter in the space provided.

i. In the given physical quantities units below, which one is the derived unit? 

1. Kilogram
2. Ampere
3. Kelvin
4. Newton

ii. Peter and Marry were performing an experiment in the physics laboratory suddenly, Peter got an electric shock and fall unconsciously, Marry scared and run away. What was supposed to be done by Marry instead of running away?

1. To call the electrical technician of the school
2. To contact the school medical doctor
3. To call other students for help
4. To administer breath exercise

iii. Juma placed an object of weight 500N on water. The object was seen totally floating on water of density 1000 kg/m³, the magnitude of the buoyant force acting on the object is:

1. 5 N
2. 500 N
3. 250 N
4. 400 N

iv. Lubricants like oil and grease are used to reduce friction in the moving parts of machinery; but why grease is much preferred than oil? what can you conclude about the

v. Swimmers prefer much to swim in sea water than in fresh water. What can you conclude about this?

1. The sea water is denser than fresh water.
2. The density of sea water is the same as that of the swimmer.
3. The fresh water is denser than sea water
4. The sea water and fresh water have the same density.

vi. The process of aligning the magnetic dipoles in all magnetic domains in the same direction is termed as:-

1. Magnetization
2. Induced magnetism
3. Demagnetization
4. Conduction stroking

vii. In the concept of pressure the expression P ∝ 1/_A means?

1. On decreasing area, pressure decrease
2. On decreasing pressure, area also increase
3. On increasing area, pressure decrease
4. on increasing area, pressure remain constant

viii. Diffusion occurs more quickly in a gas than in a liquid because:

1. The liquid contains a layer on its surface
2. The gas contains semi-permeable membrane
3. The gas molecules is small in size compared to the liquid molecules
4. The speed of molecules in gas is greater than in liquid

ix. A Mango of mass 0.6kg falls from a mango tree which is at the height of 6m from the ground .The maximum kinetic energy acquired by the mango when it is about to hit the ground is:

1. 0.36J
2. 3.6J
3. 36J
4. 360J.

x. When charging an object by friction, the particles which are transferred are:

1. Electrons
2. Protons
3. Electrons and protons
4. Neutrons 

Answers

2. Match the type of forces in List A with their corresponding effects on object in List B by writing the letter of the correct responses beside the item number in the table provided

Answers

SECTION  B (70 Marks)

3. (a) Differentiate ferromagnetic materials From paramagnetic materials by giving two typical examples of each. (04 Marks)

(b) As a student who has the knowledge of magnets, how can you advice a person who is doing the business of selling magnets the three appropriate ways of storing magnets so that they can last longer. (06 Mark)

4. (a) What is the function of the constriction in a clinical thermometer? (03 Marks)

(b) (i) A certain nurse was seen sterilizing a clinical thermometer with boiled water, which is dangerous to the thermometer. Giving reason explain why this is too dangerous? (03 Marks)

(ii) Juma has two cups of milk, cup A and cup B of the same volume, but possessing different temperatures, of 10⁰C and 50⁰C respectively. Juma was told by her mother to mix the milk in a tall jar so that to get an equilibrium temperature suitable for cooking "Vitumbua". What will be the equilibrium temperature in Kelvin after mixing? (04Marks)

5. (a) Explain why goal keepers while catching a ball always extends their hands forwards? (02 Marks)

(b) (i) State the four applications of the earth"s magnetic field (04 Marks)

(ii) A trolley of mass 20 kg loaded with a bag of maize of mass 100 ke, rest on a smooth horizontal track. If the two opposing forces of magnitude 55 N and 90 N are applied to the trolley as shown below.

Find the acceleration of the trolley (04 Marks)

6. (a) Form two students were asked by their physics teacher to give One example of scalar quantity. One student responded fast by saying "acceleration" and he deffended his answer by saying, because acceleration is the rate of change of speed. flow will you correct this student? (04 marks)

(b) A ball is dropped from a height of 20m above the ground. It hits the ground in 2s and bounces back up to a height of 12.7m in 1.6 s. What is the average veleocity for the entire motion? (06 Marks)

7. (a)In simple machine the human arm is said to be a distance magnifier. What does this statement mean? (03 Marks)

(b) The figure below shows a simple hydraulic press used to compress a bale. The cross section areas of A and B are 0.002 m² and 0.3 m² respectively.

Calculate the:

i. Force produced on B compressing the bale (04 Marks)

ii. The mechanical advantage (MA) of the press (03 Marks)

8. (a)Imagine you are given a task to design a salon using two large plane mirrors. the owner of the salon wants three images only of a customer to be seen in the mirrors when trimming. At what angle could you arrange the two mirrors to meet the owner needs? Show clearly your approach (04 Marks)

(b)The figure below shows a uniform plank with dimensions 3.0 cm wide, 0.6 cm thick and 100 cm long. The density of the plank is 2.7 g/cm³.

i. Determine the weight W of the plank (03 Marks)

ii. If the plank is in equilibrium by the forces shown in figure above. Determine the value of F and R (03 Marks)

9. (a) People are warned by Geophysicists not to build houses near geothermal power plants. Give three reasons for this warning. (06 Marks)

(b) Asha was hitting an inflated balloon with a hammer but the ballon did not burst, but when she sticked it with a pin the balloon bursted. How can you explain these two situations to Asha? (04 Marks)

SECTION C (15 Marks). 

10. (a) (i) State the ohms law (02 Marks)

(ii) How does ohm's law explain the fact that the resistance of a conductor depends on the area of cross — section of the conductor? (03 Marks)

(b) (i) Explain why the path of the lightning is not straight but zigzag? (02 Marks)

(ii) Two negative charges were brought close to each other as shown below, re-draw a well diagram to show the magnetic field lines on how these two charges interact, remember to indicate the neutral point. (03 Marks)

(c) Study the circuit below and answer the questions that follow

(i) Calculate the equivalent, resistance (02 Marks)

(ii) What is the reading of the ammeter?(1.5 Marks)

(iii) What is the reading of the voltmeter? (1.5 Marks)

Candidate's Examination No . . . . . . . . . . . . . . . . . . . . . . . 

PRESIDENT’S OFFICE REGIONAL ADMNINSTRATION AND LOCAL GOVERNMENT

LUDEWA DISTRICT COUNCIL

FORM TWO DISTRICT MOCK EXAMINATION 2022

031 PHYSICS

TIME: 02:30HOURS Friday Morning, June 10th, 2022 a.m.

INSTRUCTIONS.

1. This paper consists of sections A, B and C with a total of 10 questions.

2. Answer ALL questions from both sections.

3. All communication devices, calculators and any unauthorized materials are not allowed in the examination room.

4. All writing must be in blue or black ink EXCEPT drawings which must be in pencil.

5. Remember to write your candidate number on both pages at right hand corner of every page.

6. The following constants may be used.

• Density of water= 1g/cm3 or 1000kg/m3.
• Gravitational field strength, g = 10N/kg

SECTION A (15 marks)

Answer all question from this section.

1. For each of the items (i) – (x), choose the correct answer from among the given alternatives and write its letter beside the item number in the answer booklet provided.

(i) Physics subject is very wide to understand it as a whole. Due to that situation, scientists have decided to break it down into several concepts for simplicity of understanding and mastering. As a student who is interested in physics, what is a correct set of concepts for the reasons above?

1. Agrobusiness, mechanics and molecules
2. Heat, optics, mechanics and electricity.
3. Biophysics, chemophysics, geophysics and astrophysics
4. Wave, physics of the atom and radionuclide.

(ii) In one of the following areas, quantitative measurement knowledge plays an important role except.

1. In hospital
2. In agriculture
3. In schools
4. In smell testing

(iii) A physics teacher asked the students to explain briefly things which may cause fire in the physics laboratory. The students tried to answer but some explanations were not correct. Identify the explanations which were not correct.

1. Electrical faults
2. Presence of flammable materials
3. Carelessness in using gas lighter and match boxes
4. The colour of some chemicals supports combustion

(iv) A cooking oil was mixed with water and poured into a measuring cylinder and allowed to settle for three minutes, which one will be the observed phenomenon?

1. Cooking oil floats over water
2. Meniscus of water appeared convex in shape at the surface
3. Water floating on the oil.
4. Water and oil completely mixed up.

(v) If two cars are both travelling at 50Km/h and they collide head on, the effect is similar to a car colliding with a wall at what velocity?

1. 0 km/h
2. 10 km/h
3. 50 km/h
4. 100 km/h

(vi) Thermometer is a device that determine the measure of the kinetic energy that particles of an object possess. Part of a thermometer which prevents mercury from flowing back when temperature falls:

1. Stem
2. Constriction
3. Bulb
4. Neck

(vii) When a large body of experimental evidences support or does not support the hypothesis, what may the hypothesis eventually be considered?

1. Observation
2. Insight
3. Conclusion
4. Law

(viii) A house building contractor fitted window glass panes which someone cannot see through, but the rooms are fully illuminated with light. These types of glass pane materials are said to be:

1. Dim 
2. Opaque 
3. Translucent 
4. Transparent

(ix) The following is a reason why objects in air tend to fall at the same time when they are released from the same height h above the ground level; -

1. They have the same weight
2. There is usually no resistance in the air
3. Acceleration due gravity is the same
4. None of the above

(x) The substance which is lighter has low density and less affected by gravitational force. In comparison with water, the number of times a substance is denser than water is termed as?

1. Density
2. Relative density
3. Volume
4. Mass

ANSWERS

2. Match the items from LIST A with the corresponding responses in LIST B by writing its letter in the box provided.

ANSWERS

SECTION B (60 Marks)

Answer ALL questions from this section.

3. (a) When water and mercury were in two separate measuring cylinders, the teacher asked student to observe the reading in both cylinders. Why does mercury form downward meniscus while that of water forms upward meniscus?

(b) A force of 4 N causes a certain copper wire to extend to 1.0 mm. Find the load that will cause a 3.2 mm extension on the same wire.

4. (a) A student from school a certain school immersed the test tube into a liquid and found it is floating vertically upright. Why a test tube does so?

(b) The diagram below shows on form of man hydrometer used to measure the densities of liquid over the range of 0.8 to 1.0 g/cm3. If the area of cross section of the stem is 0.5 cm2 and the distance between the 0.80 and 100 division is 18cm.

What is the volume of hydrometer below 1.0 graduated mark?

5. (a) (i) Most of us confuses and sometimes misuse the term Energy and power that they mean the same. As a competent student give the difference.

(ii) The ball rebounds to the height less than the original height. Explain briefly why does this happen.

(b) A teacher was demonstrating the motion of the stone of mass 2 kg as it moves vertically upward but he then released it from height of 2m above the ground.

(i) How much of the potential energy at height of 0.5m does the stone possess?

(ii) Determine its kinetic energy at height of 0.5m.

6. (a) In verifying ohms law, the experiment was conducted in a place with variation of physical factors. Describe four (04) factors that affects the flow of current in the circuit?

(b) The circuit diagram below that shows the current through the 6 Ω resistor is 2.5 A.

(i) What is the magnitude of the voltage from the power supply?

(ii) Determine the current through the 8 Ω resistor.

7. (a) (i) When the pulling force is applied to the handle of the door, the hinge acts as the axis of rotation, and the door turns about. What do you understand by the term turning effect?

(ii) When forces are in equilibrium, it means that there is no net force to cause any movement. Describe conditions for parallel forces to be in equilibrium.

(b) A heavy uniform metal beam AB weighting 500kg is supported at its ends. The beam carries a weight of 3000kg at a distance of 1.5m from end A. If the beam is 4m long, determine the thrusts on the supports A and B.

8. (a) (i) During the class session, the teacher introduced the lesson that is ‘Simple Machine’. What do you understand that term?

(ii) Draw a diagram of a single – string pulley system with a velocity ratio of 4

(b) The electric motor of a crane uses 42 000 J of electric energy lifting a pack of eight bags of cement of 25 kg each through a distance of 15 m from the ground to the fourth floor. Calculate the efficiency of the motor during the lifting process

9. (a) When the metal can that containing hot water is closed, and the cold water is poured on it, the can collapses. Why?

(b) In an experiment using Hare’s apparatus, the lengths of methanol and water columns were found to be 16 cm and 12.8 cm respectively

(i) What is the relative density of methanol?

(ii) If the length of methanol column was altered to 21.5 cm what would be the new height of the water column?

SECTION C (15 MARKS)

10. (a) A form two student is in the physics laboratory. He is provided with density bottle, sand, digital balance and water. He is required to determine the density of sand using the instruments provided above, show how will he determine the density of the sand?

(b) In an experiment to determine the density of sand, Sophia obtained and recorded the following results.

Mass of the density bottle, M1 = 200g

Mass of density bottle and sand, M2 = 490g

Mass of density bottle, sand and water, M3 = 550g

Mass of density bottle and water, M4 = 300g

(i) What was the density of sand?

(ii) Determine the relative density of sand.

THE PRESIDENT’S OFFICE REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

MOSHI MUNICIPAL COUNCIL

SECONDARY EDUCATION EXAMINATIONS SYNDICATE

031 PHYSICS

FORM TWO MOCK EXAMINATION 

Friday 01^st July 2022 Time: 2:30Hours 

INSTRUCTIONS: 

1) This paper consists of sections A, B and C.

2) Answer all questions.

3) All drawings should be in pencil and writing in blue or black pen.

4) Write your names or number on the top right-hand corner of every page.

5) Cell phones and calculators are not allowed in the examination room.

6) Whenever necessary, use the following constants:

• Density of water = 1000kg/m³ or 1g/cm³ • Acceleration due to gravity, g = 10m/s² or 10N/Kg.

SECTION A (30 MARKS)

Answer all questions from this section.

1. For each of the following items (i) – (xx) choose the correct answer among the given alternatives and write its letter beside the item number.

i. An engineer wanted to measure the diameter of a wire to the nearest 0.001cm. which of the following instruments will be used?

1. Metre rule
2. Measuring cylinder
3. Micrometer screw gauge
4. Vernier caliper 
5. Engineer caliper

ii. Which phenomenon explain ability of some small insects to walk over a water surface?

1. Capillarity
2. Adhesion
3. Surface Tension
4. Osmosis

iii. The branch of science in which the relationship between matter and energy is studied is referred to:

1. Biology
2. Chemistry
3. Physics
4. Agricultural science
5. Geography

iv. Which of the following instruments work under the Pascal’s principle of pressure transmission

1. Spring balance
2. Single fixed pulley
3. Inclined plane
4. Hydraulic press

v. The process whereby materials recover the original length after removing the load or force is described as.

1. Plasticity
2. Deformation
3. Elasticity
4. Elastic limit

vi. The term used to describes the ability of an object to float on a surface of liquid is classify as:

1. Floatation
2. Buoyancy
3. Density
4. Pressure

vii) The quantity obtained by taking the ratio of mass per unit volume of a substance is described as:

1. Relative density
2. Density
3. Matter
4. Volume

vii. Which of the following is the process used to descried the action of movement of solvent molecules from high to low concentration through a semi-permeable membrane?

1. Fusion
2. Osmosis
3. Pressure
4. Diffusion

viii. Materials can be twisted into different shapes. Which among the following forces causes twisting of elastic materials?

1. Restoring force
2. Compressional force
3. Stretching force
4. Torsional force

ix. What is the name given to a material which has ability of attracting some other materials?

1. North pole
2. Electromagnet
3. Magnet
4. Marble stone

x. How does depth affect the pressure in liquids

1. Pressure is inversely proportional to depth
2. Pressure is equal to depth
3. Pressure is not equal to depth
4. Pressure is directly proportional to depth 

xi. What among of the following term is used to explain the tendency of a liquid to rise or fall in a narrow tube?

1. Diffusion
2. Capillarity
3. Adhesion 
4. Cohesion

xii. A machine with effort between load and fulcrum belong to which class of lever?

1. First class lever
2. Third class lever
3. Second class lever
4. Fourth class lever

xiii. Which of the following are correct information about the particles on solid state of matter .

1. Are far apart, vibrating and randomly in motion
2. Are closely together, weak force of attraction and stationary
3. Are closely together, vibrating and strong force of attraction.
4. Are slightly far apart, moving randomly and weak force of attraction

xiv. The materials which do not completely allow the light to pass through

1. Transparent
2. Translucent
3. Luminous
4. Opaque 

xv. What happened behind an opaque object when a beam of light falls on it?

1. Umbra
2. Shadow
3. Penumbra
4. Beam

xvi. Form two students asked to identify the presence of charge on an Object which among of the instrument should they use ?

1. Capacitor
2. Resistor
3. Electroscope
4. Gold leaf electroscope

xvii. A resistor of 6Ω connected with 24mv battery. What will be the current in Ampere?

1. 0.004A
2. 40A
3. 12A
4. 4A

xviii. Why it is possible for a bus loaded on top carrier to skid when changing direction at high speed?

1. Because its centre of gravity is at lower position
2. Because its centre of gravity is at centre
3. Because its centre of gravity is at higher position
4. Because it is very stable

xix. What criterion supports that single fixed pulley is a machine

1. Used to lift heavy loads short distance
2. Used to lift light loads to inaccessible point
3. Effort used is less than load
4. Effort used is greater than load 

xx. Which among of the following machine work under the atmospheric pressure principle?

1. Hydraulic brake system
2. Screw Jack
3. A siphon
4. Pressing machine

2. Match the description of electric terms in list A with the correct electric terms in list B by writing a letter of the correct response below the corresponding item number in the table provided

3. Complete each of the following statements by writing the correct answer on the space provided

i. A tendency of an object to fall to the lower level in fluid is called

…………………………

ii. An upward force exerted on object when it is totally or partially immersed in fluid is known as ……………………

iii. A product of force and perpendicular distance is known as …………………………

iv. A percentage ration of work out put to work input is known as

…………………………

v. An effort of 50N used to operate a machine to lift up a load of 150N the mechanical advantage ( M.A) of the machine is …………………… 

SECTION B (40 Marks)

4. a) state laws of reflection

b) Explain the behavior of light when it encounters translucent, transparent and opaque materials

c) Calculate number of images when the angle between two plane mirrors is: i. 60⁰ ii. 0⁰

d) How the number of images formed by plane mirrors related to the angle between two plane mirrors?

5. a) State conditions for a body to be in equilibrium.

(b)By using the principle of Moment determine unknown Weight (W) on the fig below.

(c)A machine having velocity ratio (V.R) of 5 need an effort of 240N to raise a load of 720N. How much 

i. mechanical advantage

ii. Efficiency (e)

6. a)i. Differentiate Distance from displacement.

ii. Write down three equations of linear motion

b) A paratrooper falling under gravity after 6 seconds, 

i. what will be the maximum height covered?

ii. What will be its velocity when hitting the ground?

7. a) Kinetic energy potential energy are forms of mechanical energy. Give comparison and differences between them

b) A car of mass 4tones travels at velocity of 4m/s .How much kinetic energy developed?

c) How much power developed when a crane lifts a container of mass 500kg through a height of 5m in 10sec ?

SECTION C (30 Marks)

8. a) By using a concept of pressure explain why a tractor is designed with wide tires?

b) A rectangular block weighting 320N has dimensions of 4m x 2mx 10m. What is the greater pressure and least pressure it can be exerted on the ground?

(c). Explain why the wall of the dam is made much thicker at the bottom than at the top?

d) What is usefulness of atmospheric pressure in real life situation? (Any three)

9. a) state Newton’s laws of motion

b) i. Give reason why a person doing high jump bend a little his legs on landing ii. Why it’s necessary to use seat belt in a car?

c) A tennis ball whose mass is 150 g is moving at a speed of 20 m/s. it is then brought to rest by one player in 0.05 s. find average force applied

10.a) Explain why efficiency of machines is always less than 100%?

b) An object weight in air is 6.0N and 4.0N when immersed in water. What will be its:

i. Up thrust in water

ii. Relative density

iii.Density

c) Give reason why a ship can move on surface of water without sinking?